Extensible member for adjustably attaching a light diffuser to a lighting



p 1951 J. KRAUTHAMER EXTENSIBLE MEMBER FOR ADJUSTABLY ATTACHING A LIGHT DIFFUSER TO A LIGHTING Filed Aug. 19, 1947 2 Sheets-Sheet 1 FIG.3.

FIG. 5.

INVENTOR JOSEPH KRAUTHAMER BY j l 5 ATTORNEY FIG.6.

J. KRAUTHAMER Sept. 25, 1951 EXTENSIBLE MEMBER FOR ADJUSTABLY ATTACHING A LIGHT DIFFUSER TO A LIGHTING 2 Sheets-Sheet 2 Filed Aug. 19, 1947 I III nu l..-

u u 2 Ar Ar r 2 9 a f 5 mmflpncn uh a: I- I I-|- u v a I. n W 6 n n 2 M 6 n m I M 9 a 5 u l w 6 :El a 5 S 2 7- ll 3 3 INVENTOR JOSEPH KRAUTHAMER,

ATTORNEY Patented Sept. 25, 1951 U D STATE EXTENSIBLE MEMBER FOR ADJUSTABLY ATTACHING A LIGHT LIGHTING DIFFUSER TO A p I, Josef Krauthan'ier, New York, N. Y. Application August 19, 1947, Serial No. 769,408

' 2 Claims. (01. 240-78) This invention relates to a drop-extension 'fmember for adjustably attaching a globe or similar light diffusing member to an electric lighting fixture and refers particularly to an extensible attaching andfc'arrier member for lighting fixtures whereby a disk shapedglobe, disk or plate shaped light difiuser may be lowered 'without removing same from the fixture to perj mit accessibility to light bulbs when necessary to replace same. An object of this invention is the provision therein of an extensible carrier, element in a light fixture which will hold suspended, a globe, disk or plate light diifuser. thereon, and ermit the said light difiuser to be lowered without detachment from said fixture thereby makin the light bulbs readily accessible for replacement, and including a means for holding the said light diffusing element in its raised or lowered position.

Another object of this invention is the provision therein of an extensible carrier member which will support a canopy and permit the lowering of same without detachment from the lighting fixture thereby providing ready access to the wiring connections normally covered by the canopy A still further object of this invention is the provision of a device in which the constituent elements are so arranged structurally and functionally as to assure improved results with m a- "j. The invention 'possessses other objects 311111.

features of advantage, some ofwhich, with the foregoing will be setforth in the following de- 'sc ription and in the claims whereinparts will 'bejidentified by specific names for convenience,

'jbut they are intended to be as generic in their application to similar parts as the art will permit. In the accompanying drawings there has been illustrated the best embodiment of the invention known to me, but such embodiment is to be regarded as typical only of many possible embodiments, and the invention is not to be limited thereto. i

The novel features considered characteristic of my invention are set forth with particularity in the appended claims. The invention itself,

however, both as to its organization and its niethod of operation, together with additional objects and advantages thereof, will best be understood from the following description of a specific embodiment when read in connection with the accompanying drawings, in which: I

Figure 1 is a sectional view, in elevation, of one end of a light box, showing an extensible carrier member supporting a glass plate against the under side of a light fixture.

Figure 2 is a similar. view-showing the extensible carrier'member extended and holding the glass plate in its lowered position and opening the light box.

Figure 3 is a perspectiveview of a complete lighting fixture as viewed in a recess in a ceiling.

Figure 4 is a similar view showing the light box open and the. ceiling structure in section with the front wall of the light box removed.

Figure 5 is a sectional view of alighting fixture ShOWll'lg a bowl shaped light diffuser supported by the extensible carrier member. The full lines showing the bowl-in its normally raised position while the dot-dash lines show the extensible carrier member and its attached bowl in lowered position.

Figure 6. is an enlarged view, in detail, of the lower portion of the extensible carrier member.

Figure 7 is a pulled apart view of the various parts of theextensible carrier member forming the basis of this invention. a

Figure 8 is aperspective view of a lighting unit mounted in a ceiling recess and shows two extensible carrier members. a V.

Figure. 9 is a lon'g-itudinalsectionalview of one end of the fixture. shown in Figure 11.

Figure 10 is a view similar to that of Figure 9 but shows the extensibleplate carrier extended to lower the attached plate and thus open the l light boxof the fixture. r

- Figure 11 is ,asectional elevational view showing another application of the extensible carrier member.

which a cap .20 engages. The said cap 20 is .threaded upon. and attached to the upper threaded portion 2| of a tubular carrier member 22 engaging aroundthe said stem-like hanger H. and adapted to vertical reciprocal movement thereon; The lower end portionof the tubular carrier member 22 is threaded as at 23 and has threaded thereon .a circular or nut member .24 and a cap 25 having an orifice 26 of suflicient diameter to allow the broadened end l3 of the stem-like hanger II to engage therethrough.

The narrower portion of the aforesaid stem ll is adapted to engage through an orifice 21 in the cap 20. Interposed between the nut 24 and the cap 25 there i a plate member 28 of glass or any suitable translucent material and between the said plate 28 and ;the -nu t 24 and cap 25 thereis disposed washers 29 and30 respectively, of any suitable resilient material. A cap 3| having a nut formation 32 thereon is adapted to bethreaded upon the lower threaded end l3 of the stemlike hanger II when the said stem-like hanger extends through the orifice 26 a shown in Figures 1, 3, 5, and 6.

The complete extensible carrier member comprises six parts, see Figure -6, which may be assembled in the following order. The cap 20 is slipped over the end l2 of the stem Ii and the said end l2 of the stem is secured to the light box H by means of the saidnuts l5 and-I6. The tubular carrier member 22 is then threaded: into the cap 29, th washer-nut 24 then threaded over the threaded end23, or the tubular carrier member 22. A resilient washer 29 "follows and a glass plate 28, or any suitable light diffusing member, is slipped over the end, 23 and held plate 28 and the cap 25. The device thus assembled willassume the ,appearanceindicated in Figure 2 whichshows the light diffusing Plate 28.; held in itslowered position away from the light box 14 exposing the light bulbs 33 and maging them accessible for removal and replacement.

Figure 1 shows the stem-lik hanger ll, of the f x ensible carrier member telescoped withinv the tubular carrier member 22 and theend I3 of the saidstem protruding,through the orifice 26 of the cap 25 to receive upon its extreme end a cap-nut 3| which is screwed thereon as already shown in Fig ur e 6. ,In the position just ,de-

scribed, theplate 28 is;held clqsely against the light box (Figs. '1, 3 and 9). :When, however, the cap nut3i is removed, the tubular member.

22, carryinggthe, plate'2 8 is allowed to drop until the shoulder 19 on the stem-,like hanger H, en-

gages the cap 20 through the orifice 21 of which the said stern-like hanger II engages, as clearly shown in Figure 2. V

In Figure 3, there is shown a ceiling fixture having a light box, l4 recessedin the ceiling L8, and shows a light diflusing plate 28 of transparent or translucent materiaLheld in its closedposiexposing the light tubes 33,

In Figure 5, a regulation ceiling fixture is 1 tion by the cap-nuts3 i. When these cap-nuts are removed, the plate 28 will drop to the p sition shownin Figure 4, opening the light box 14 and shown. .In this type the stern II i attached to the cover plate 34 of anoutlet box ,35 suitably attached in a recess in the ceiling l8. Wires 36 and 31 leading from a conduit connection (not shown) in the said outlet box 35, supply current to the light bulbs38 and 39 respectively and a lbowl shaped globe 40, usually of translucent material masks the said light bulbs andis held in place, as shown, by the cap-nut3l which in turn engages the orificed cap 25 to hold the tubular member 22 in its uppermostposition. as shown by the full lines. The dot-dash lines indicating the lowered position of the extensible carrier member and its attached globe 40.

Figure 8 shows aplate 28' suspended by a single extensible carrier member at each end there- 'of and a light box l4 recessed in the .ceiling l8,

the light bulbs 33 being one or more in number.

open condition respectively, of the light fixture.

Figure .11 shows still another application of the extensible carrier membenwhereinrecessed ceiling light fixture, having a high intensity light bulb, is mounted in a ceiling recess or pocket 53. A plate 54 is suitably attached in said pocket and carries a, socket 55 and light bulb '56 around which there is mounted a reflector 51 whose outer lower edge is formed with an annular flange 58. The stems l i are three or more in number and are attached to the plate 54 in the manner already described. To the lower ends of the tubular members '22 there is attached, by means of nuts 59 and caps 25, an annular ring 60 which is formed with annular ledge 6| adapted to carry a plate 62 of, suitable translucent material. The full lines in this figure show vthelowered or opened position of the lighting fixture while the dot-dash lines show raisedposition of the movable parts .and the closedposition of same.

I claim:

71.. Ina ceiling lightsfixture comprising an open end light box recessed within a ceiling structure, a light unit within the light box, a multiplicity of supporting members secured within the light box, the lower ends of the supporting members extending below theopen edges of the light box, the supporting members comprising stem-like hangers having their upper ,ends secured to the light box, their lowerends broadened to form a shoulder and a threaded portion upon the broadened end, tubular carrier members externally threaded at both ends andslidably engaging over the stem-like hangers, orificed caps threaded upon the upper ends of the tubular carrier members, engaging over the stem-like hangers and contacting the shoulder formed thereon to limit the downward movement. of, the tubular carrier, a light diffusing plate having orifices therein engaging over the lower threaded ends of the tubular carriers, orificed internally threaded members engaging thelower threaded ends of the tubular carriers to hold the diffusing plate upon the tubular carriers and supporting nutshaving a threaded bore engageable with the threaded broadened ends of the stem-like hangers adapted to hold the tubularcarrier members and their attached light diffusing plate .in raised position.

2. In a ceiling light fixture aset forth in claim 1, including internally threaded adjustable washers engageable upon the lower threaded portions of the tubularscarrier members and orificed gaskets engaging over the lower threaded portions of the tubular carrier members disposed between the adjustable washers and the light diffusing plate and the supporting nutand light diffusing plate.

JOSE'F KRAUTHAMER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,357,568 Jones Nov. 2, 1920 1,719,401 Plant July 2, 1929 1,794,837 Doane Mar. 3, 1931 1,844,639 Crumpton Feb. 9, 1932 1,882,312 Aspinwall Oct. 11,1932 2,227,655 Levy Jan. 7, 1941 2,274,612 Johnston Feb. 24, 1942 2,309,143 Sutherland, Jan. 26, 1943 2,365,614 Winkler etal. Dec. 19, 1944 

